Active clinical trials for "Infections"

This is a combined retrospective and prospective, longitudinal, observational meta-cohort of individuals who will enter the cohort with and without SARS-CoV-2 infection and at varying stages before and after infection. Individuals with and without SARS-CoV-2 infection and with or without Post-Acute Sequelae of COVID-19 (PASC) symptoms will be followed to identify risk factors and occurrence of PASC. This study will be conducted in the United States and subjects will be recruited through inpatient, outpatient, and community-based settings. Study data including age, demographics, social determinants of health, medical history, vaccination history, details of acute SARS-CoV-2 infection, overall health and physical function, and PASC symptom screen will be reported by subjects or collected from the electronic health record using a case report form at specified intervals. Biologic specimens will be collected at specified intervals, with some tests performed in local clinical laboratories and others performed by centralized research centers or banked in the Biospecimen Repository. Advanced clinical examinations and radiologic examinations will be performed at local study sites with cross-site standardization.

In this study, we evaluate peri- and postoperative parameters of patients undergoing a cystectomy and try to find risk factors for infectious complications. In detail, we analyze their medical history, demographic data, lab values, microbiological tests as well as histological and radiological findings. Furthermore, after discharging our patients, we send them several follow-up questionnaires at regular intervals and offer them free follow-up examinations.

Determining whether in the mouth there are differences between the participant groups in the nature and activity of mucosal innate immunity, in immune responses to SARS-COV2 antigens, or in the oral microbiome

The purpose of this study is to learn more about how to better track smell recovery in people who have been infected with the SARS-CoV-2 virus (which causes COVID-19). Many people who have been infected by this virus develop changes in their sense of smell (olfaction). We are interested in measuring smell function objectively via smell cards that test odor intensity, identification, and discrimination. Objective and precise olfactory testing that can be performed in the convenience of one's home will help identify people with smell loss after infection by SARS-CoV-2. We will use results from this test to better understand the relationship between SARS-CoV-2 infection and recovery of olfactory function and to learn whether the AROMHA longitudinal smell test is a reliable olfactory function tracking tool to quantify smell loss in the context of COVID infection. These results may inform the design of therapeutic clinical trials to accelerate the recovery of smell function.

To perform a prospective, observational, international, multicentre, in vivo study to assess the performance of regular arrangement of collecting venules (RAC) for the exclusion of Helicobacter pylori (Hp) infection using white light high definition (HD) endoscopy without any kind of zoom or magnification. Gold standard will be mucosal biopsies (Sydney protocol) or urease test. Immunohistochemistry (IHC) should be performed in case of a negative histologic study for Hp in patients taking proton pump inhibitors (PPIs). Participants will perform a training test with 20 pictures of the distal part of the lesser curvature before starting the inclusion of cases. Secondary objectives are: To assess whether age, sex and PPIs, have an influence on the results of RAC. To assess the correlation of atrophic gastritis and intestinal metaplasia (confirmed in histopathological samples) and RAC. To assess reproducibility of RAC on real time examinations with different operators and in different countries with different Hp infection prevalence. Primary and secondary variables The primary study variable is: - Endoscopic detection of RAC. Secondary variables will be considered: Sex Age PPI intake in the last two weeks Centre Country Hp prevalence Endoscopist Type of endoscope Significant findings (need of histological confirmation) Atrophic gastritis Intestinal metaplasia Erosive gastritis Benign gastric ulcer Gastric adenoma Gastric cancer

Carbapenem-resistant Enterobacteriaceae (CRE) are increasingly identified in children in China. Pediatric intensive care unit (PICU) is the high-risk area. However, data on the epidemiology of CRE in hospitalized children in PICU are limited. The objectives of this study are to characterize the risk factors for colonization or infection with CRE and describe the microbiologic characteristics of pediatric CRE isolates. The investigators will perform a single retrospective study from January 2018 to December 2019 at PICU of Children's Hospital of Fudan University .

COVID-19 is the pandemic disease caused by the SARS-CoV-2 coronavirus. It is a highly contagious viral disease, the condition of which main clinical symptoms are characterized by fever and respiratory symptoms. Evidence indicates to worse outcomes in patients with pre-existing diseases, such as diabetes, arterial hypertension, heart disease, pneumopathies, chronic kidney disease, and immunodeficiencies. Recipients of kidney transplants make prolonged use of immunosuppressive drugs to inhibit the acquired immune response, notably the activity of lymphocytes. Due to this potential to modulate the immune and inflammatory response, it is speculated that the clinical and laboratory condition of COVID-19 in these patients is atypical. Preliminary evidence suggests worse outcomes of COVID-19 in immunosuppressed patients, as carriers of cancer. However, information on kidney transplant recipients is insufficient. So far, only reports of the case are available in the literature with different clinical presentations and outcomes. The aim of this study is, therefore, to characterize the demographics, clinical and laboratory conditions, and the outcomes of COVID-19 in kidney transplant recipients in a national multicenter cohort.

Community bacterial infection remains to this day a common cause of morbidity and mortality in children, which preventability is a challenge for clinicians. In a previous work, the investigators found that 76% supported children admitted to the ICU for severe bacterial infection were appraised as suboptimal and significantly associated with an increased risk of death. In this context, the investigators seek to identify indicators of extractable data PMSI and SNIIR -AM associated with a higher risk of suboptimal early taking care of children with severe bacterial infection in order to combine them and use them as a score or decision tree that the investigators will validate data from a national prospective multicenter study including 512 children admitted to the ICU for severe infection. The investigators then propose a score associated with a risk of suboptimality care to evaluate the performance of the healthcare system .

Background: - Researchers are interested in studying disorders that make individuals more susceptible to fungal infections, specifically infections with the Candida yeast. These disorders are often related to problems with the immune system and may have genetic factors, which suggests that researchers should study not only the individual with the disorder, but also his or her first- and second-degree relatives (such as parents, siblings, children, and first cousins). To provide material for future research, individuals with immune disorders and their first- and second-degree relatives will be asked to provide blood and other samples for testing and comparison with samples taken from healthy volunteers with no history of immune disorders. Objectives: - To collect blood and other biological samples to study immune disorders that make individuals more susceptible to fungal infections. Eligibility: Individuals of any age who have abnormal immune function characterized by recurrent or unusual fungal infections, recurrent or chronic inflammation, or other types of immune dysfunction. First- or second-degree genetically related family members (limited to mother, father, siblings, grandparents, children, aunts, uncles, and first cousins). Healthy volunteers at least 18 years of age (for comparison purposes). Design: Participants will provide blood samples and buccal (cells from the inside of the mouth near the cheek) samples. Participants with immune disorders will also be asked to provide urine samples, saliva or mucosal samples, or skin tissue biopsies, and may also have imaging studies (such as x-rays) to collect information for research. Samples may be collected at the National Institutes of Health or at other clinical locations for the samples to the sent to the National Institutes of Health. No treatment will be provided as part of this protocol....

To describe clinical, immunological, and virological characteristics of persons with acute HIV infection To describe demographics and behavioral risk factors for those identified with acute HIV infection To describe neurocognitive function and neuroimaging findings in acute HIV infection as well as describe immune response, HIV-1 genotypes and sequences in the cerebrospinal fluid. To describe the number and characteristics of sexual contacts To describe the willingness of acute HIV-infected subjects to allow the tracking of their sexual contacts for voluntary HIV counseling and testing (VCT) To describe immune response, HIV-1 genotypes and sequences in the genital compartment To describe T cell depletion in the gut mucosa in acute HIV infection and describe the changes in gut T cell during follow up To archive samples for future investigations including determination of viral evolution, and cell-mediated and humoral immune responses in peripheral blood and mucosal compartments